Liquid dispensing apparatus



Feb..7, 1933. v1 MccANDLEs's 1,896,751

LIQUID DISPENSING APPARATUS 5 Sheets-Sheet 1 Filed May 13, 19:29h

Feb, 7, 1933. 1 MccANDLEss LIQUID DIsPENsING APPARATUS :s 'sheets-sheet2 Filed May 13, 19294 Feb. 7, 1933. L. MccANDLEss LIQUID DISPESINGAPPARATUS 3 Sheets-Sheet 5 Filed May 1,3", I19729 lull" Patented Feb.'7,

UNITED STATES PATENT ort-'ICE LYONl xcc'ANDLEss, or nocHEs'rEa,PENNSYLVANIA, .AssIeNoa To TEE WAYNE rum courANY, or nAL'rmoaE,nAnYLANn, A coaronArroN or MARYLAND LIQUID DISPENSING APPARATUSApplication ledulay 13,

This invention pertains to liquid dispensing apparatus, and moreparticularly to that f type of gasoline dispensing device known aslasting over a considerable period. The earliest commercial use ofdispensing apparatus of this type in connection with the handling ofgasollne probably was effected to indicate the approximate number ofgallons 'of `asoline transferred to or from storage Ata s in bulkstorage'plants. The next step was the use of meters in connectionwiththe retailingof gasoline when it was desired to deliver the gasolineAfrom a reservoir directly to a point removed from and ata considerablylower level than said reservoir.` The first real commercial developmentin retailing gasoline by meter pumps was made possible by theuse of airpressure as a prime mover of the gasoline, this air pressurebeingintroduced into the gasoline storage tank for causing the gasoline to beforced through a remote measuring meter. The airpressure could beeasilyr controlled s o thatV a constant pressure was vkept on the liquidat the meter which made it possible for an accurate operation ofsaidmeasuring meters. This system, though` accurate and comparatively easyto handle, had many disadvantages in that the tanks which must beconstructed to` stand 'the necessary air pressure were expensive to'manufacture, and then there was the obvious hazard of mixing gasolineand air under pressure.. The cost of compressin the air, the'diflicultyexperienced by the reezing up of 'water of condensation produced bytheexpanding compressed air, and the expensive and complicated "pipingsystem necessary for this type of installation, all contributed tomaking this type of system more or less prohibitivein price, es eciallywhen competing with the cheaper visi 1e type The meter system howeverlwas continually improved, and the'next developments came along twolines; one with the self-contained power plant in the meter housing, andthel other including a centrally located power 1929. Serial No. 362,840.

' plant supplying a numberof dispensing pumps in a system. In thislatter system, the discharge from va `rotary or other mechanical pumpconnected all the meters so that gasoline could vbe dispensedselectively from any one of the meters, and the constant pressurenecessary for the accurate operation of the measuring meters wasmaintained by means of a relief valve which communicated tothe storagetank through an overflow pipe or a by-pass around the pump. This systemhad an advantage in that by means of the relief valve and overflowconnection, a constant pressure was very easily-maintained, but thechief disadvantage was that a sepa-v rate power plant was required foreach grade of gasoline which was dispensed in the service station--adecidedly impractical system now because in a great many servicestations no two pumps in the entire `battery are used to dispense thesame grade of gasoline. Another disadvantage was thatv if the powerplant was made sufiently large to take 'care of all the metersdispensing simultaneously, a considerable waste of power occurred whenonly one pump was vdischarging .at a' time.

The meter system had avery serious competitor in these-called visibletype of gaso- I line dispensing apparatus, which type is easy to handleand operate, is'comparatively accurate and is inexpensive to build andmain-- tain. However, the meter system has many advantages over other'gasoline dispensing s stems, a few of the same being as follows: nlyone pipe connection is necessary tothe supply tank or reservoir, andwhile a piston type pump requires only one connection, the lvisible typedispensing apparatus requires two, name1y,a suction and an overflowpipe. nother advantage is that Aan unlimited numberof gallons of liquidmaybe dispensed by th operator 'u p. to the capacity of the tank in anyoperatmg cycle. In'ths respect,

the meter systemv contemplatedis decidedly` more advantageous than thepiston pump type having several cylinders. With this latter type, astopv must be made tol disengage' one cylinder and engage the other, andwhile this stop is only momentary, it is lost time, and the operatingcycle is confined/to` who has entire 'control ofthe flow of` gasoline,can shut off the flow at any time and is in a position to see when areceptacle, such as an Aautomobile tank, is filled. Also, lthe livegalloncycle of the piston type pumps and the earlier visible pumpsproduced a result whereby the motorist bought gasoline in five waitwhile that part of the cycle was completed which did. not ydispensegasoline into his car in unlimited amounts., This advantage of controlat the nozzle to dispense any number of gallons of gasoline is of coursea valuable sales feature, and besides beingv more convenient, isdecidedly more accurate than the eye measurement necessal7 inthe latertype of visible pumps.

et another advantage in nozzle control is that the hose is not drainedsincel the con,- trol valve is at the end of the hose. This of courseeliminates the loss of time vrequired in draining the hose and effectsmore accu- Y rate measure since considerable time is re- 89 vpump is of1% inside diameter, while with quired to `com letely drain the contentsof the usual 10- oot .hose into the customers tank, and in reality inpractice the hose is never completely drained. Further, the measurementofl the number of gallons dis'- pensed is at the end of the hose sincethe hose is always filled as opposed to having to ll a measuring chamberremote from the point of discharge, as in the visible pump.- l

A further advantage of the nozzle control is evideng'ced-by a comparisonwith the wet hose of the visible'pumps, considering that the rate ofdischarge depends amon other factors on the' resistance olered t'olexliquid in its passage from the pump cylinder to, for instance, thecar tank, and for this reason, a large and cumbersome hose has beenemployed to -give free passage to the liquid. As an illustration, themost common size hose in use today in the visible type the present metersystem, it is possible to use a hose of f3/ inside diameter, which hoseis of course moreeasily handled since it weighs considerably less and ismore flexible.

The piston pumps are able to use a smaller allon llots as he was,unwilling tohose than the visible since thisfactor is not sov much of aninfluence on the speed of delivery; however, if carried toov far, itwill result in an increased amount of work necessary to pump thegasoline. -A comparison of the meter pump/ ose and the visible ump hosewill readily disclose a distinctv saving in cost for the sameresultsaccomplished, together with a decided ease in handling.

A still further advantage of themeter system over other gasolinedispensings stems is that the gasoline is dispensed un er pressurerather than by gravity alone, `which means that high tanks can bereadily filled and the hose nozzle carried to-relatilvely in.-accessible points, and while piston' pumps deliver asoline underpressure, the hose must be rained, which nullifies the other advantageto a largeextent.

Yet a further advantage in the pressure type pump is that an-audibleindicator may be associated with the measuring device, forl instance,bells may have cooperative. relaition with the meters and be arrangedinsuch a way as to ring with each gallon dispensed.

An additional advantage is vthat the meters are provided with atotalizing counter which enables the station agent to keep an accurateperiod; a motoriststank may be filled with- I out regard 'to the numberof gallons to be used, and the record of this number is vis-v ible tothe customer and the operator. This of courseis true with the eyemeasure of the visible type pump only. to the extent. of the capacity ofthe usual measuring chamber.'

Another additional advantage is that'the meter system is or can be madethe fastest means of dispensing gasolinev in existence' since its speed`is limited only by the .capacity the dispensed gasoline.`

' he metertype pump with-the self-conf) tained power plant besideshaving thel a'bove enumerated advantages has the advantage c that onlythe motor for the particular pump in use is working when yany dispensingapparatus is being operated.

Another advantage is that on account of t connections, such as by-passmeans between record of the gasoline dispensed overany los' of theinletof the tank which is to receive the pump passage and the suctionline, only one connection, that is, the suction line, is re uired toeach tank.

etvanother advantage is adaptability to replace other installations'. Inany pump installation however obsolete, there is a suction line to thetank or reservoir so that it is ossible to change the obsolete pumpinsta ations over to this type of meter -pump with no substantial changein pipe connections. This is a very important factor since in many casesthe piping is embedded in or covered by a concrete base.

A furtheradvantage is that with the 'selflfA contained meter type pump,the .pump unit maybe moved from place to place without -favorableoperating. conditions.

installing piping changes. In many of the meter pum s now in use,diiiculty has been encountere in the' use of by-pass valves to maintaina suiciently high constant pressure to operate the meters under theirmost This disadvantage has been met by employing a relief valve with anoverflow connection in the self-contained meter unit, and it is anob'ectof this invention to provide a pump un1t employing a by-pass connectionhaving a pressure regulating device associated therew1th, which deviceis so constructed as to prevent vibration of the valve without thesacrilice of operating efliciency.

Another object of this invention is to provide a dispensing apparatuswhich successfully meets all service `and manufacturing requirements andwhich embodies all of the advantages above enumerated and successfullyovercomes the disadvantages usual in this type of systems as well asthose of other dispensing systems.

Another object is to provide a dispensing device having a plurality ofdischarge means which may be successively or simultaneously operated,the same cooperating with means whereby one of saiddischarge devices maybe operated and will permit operation of the .f pump regardless of thedisposition of' the other discharge means. Y

A further'object is to provide by-pass means associated with the pumpingunit, which by-pass is arrangedl to prevent chattering, yetsatisfactorily operates to -divert the flow of liquid in the systemunder given conditions whereby no further liquid may be Lpllllmped fromthe reservoir. y

. otherv object is to provide a meter vsystem whereby it is possible toprevent the maintaining lof excessive temperatures in the system.

A still further object is to providea meter stem which effectivelyeliminates vapor in'4 t e system wherebfy an accurate measuring will beobtained lo the liquid dis ensed.

Yet a furtherl object is to provi e gasoline dispensing apparatus havingvisible indicatlon means of the liquid contained in orY being dischargedfrom the system, whichl means is also provided with means for auto'-matically removing air or vapor trapped or 'produced in the system.

With these and various other objects'in.

Y view, the .inventiorrmay consist of certain novel features ofconstruction and operation, as will be more fully described andparticularly pointed out in the specification, drawings and claimsappended hereto.

4'In the drawin which illustrate an embodiment Aof the evice and whereinlike reference'characters are used to designate like parts- Figure 1 isa sectional side elevation of the meter pump, which is thesubject-matter of this application;

Figure 2 is a sectional elevation of the Figure 3 is an enlargedsectional elevation of a. portion of the meter system, showing thecontrols for the motor and discharge in inoperative position, the samecorresponding to the 'view shown in Figure 2;

Figure 4 is an enlarged sectional elevation of a portion of the metersystem, showing the controls for the motor and discharge in inoperativeposition, the same corresponding to the view shown in Figure 1; Figure 5is an -enlarged lfragmentary sectional elevation of the pump andnon-chattering by-pass connection; Figure 6 is an enlarged fragmentarysectional elevation ofthe slght glass embodying indicating means and airand vapor-eliminator;

Figure 7 is a more or less diagrammatic elevation of the device whichmay be in- Vserted in the suction line between the pump and the meterfor the elimination of vapor from the gasoline to be measured'andpensed; and

Figure 8 is amore or less diagrammatic elevation of a cooling systemwhich may be employed .in this type of pump, the samev being shown asassociated with the dispensing pump and the byipass. y Referring firstof all to Figures 1 to 4 inclusive, the metering dispensing apparatus isprovided with a base 10 to which is secured an upstanding standard orcasing 12 provided with a head 14 supporting meters 16, above which issecured the dome 18 providing a support for any usual indicatinginsignia, which may be secured tothe collar 20. The meterV pump systemconsists essentially of a suction` line 22 which is connected to anysource of supply (not shown) and is provided with a readily removablestrainer 24 and a check valve 26 which may be of any desired type, whichcheck valve prevents flow of gasoline from the system back to the sourceof supply, said check valve being located in the suction line ahead ofthe pump 28.

The pump 28 is provided with a pump shaft 30 having a sprocket 32provided. thereon, said sprocket being engaged by the chain 34cooperating .with sprocket 36 of the electrical motor or other primemover 38. Another' sproclet 40is provided on the shaft 30, the saidsprocket meshing with the chain 42 secured to the idler shaft 44, saidshaft havinga suitable clutchfconnection 46 whereby the handle 48 mayactuate the shaft 44 to thereby operate the pump 28.- The pump casingadjacent the upwardly extending portion of the suction line 22 isprovided with an air dome 29, said dome being inserted to absorbexpansion of the liquid in the system,

respective meters 16,. which meters 16 are actuated by the liquidpassing-therethrough to the respective connections 53 disposed betweenthe meters and the sight glasses 54, which sight glasses are connectedto the discharge hose 56 provided with the nozzle 58.

The nozzles are provided with valve mecha nism, indicated generally at60, the valve thereof being arranged to seat with the flow ofliquid,'said valve being operated by the pivoted lever member 62 carriedby the hand-grip 64. lThe nozzle`58 is preferably provided with aflexible extension 66 for directing the liquid to any desired place.

Hooks 68 are pivoted to the casing 12 at 70 and provide means forsupporting the nozzles 58 in an uprightl and convenient position, eachhook being provided with a link 72 pivoted to the inner end thereof asat 74 and extending downwardly and pivoted to lever 7 6 of the valve 52.Said lever is secured to a shaft 7 8 provided .with a cam 80 havingengagement with a normally closed valve disc 82, said valve disc beingprovided with a valve stem 84 slidable in guide 86, the guide 86 forminga support for a spring 88 provided between the valve disc and said guideandl tending to maintain the valve disc 82 in seated or closed positionso that no liquid can normally pass through the valve 52. A stop 90 maybe conveniently secured to the meter supply lines for limiting theposition of the y levers 76 of each of the valves 52.

Electricity is. supplied to the motor through conductors incased in theconduit 92, the same being connected tothe motor as at 94, the conduitextending upwardly to switch box 96, said switch box being provided witha switch member 98 adapted to control the operation of the motor throughmovement'in a substantially vertical direction. The conduit extends fromthe switch box 96 upwardly toa switch control 100 which controls oper-.that by raising the outer end of the hook ation ofthe light connections102 and 104. The switch member 98 is controlled through the rod i106which extends upwardly from` said switchvmember to a crosshead 108having outwardly extending members 110 thereon, which members rarerespectively disposed in slots 1f12'provided in the inner ends of eachof the hook members 68 so that it will' be seen member 68, the samepivots about the pivot point 7 0, repressing the crosshead 108 andconsequently the operating rod 106, which in turn -causes operation ofthe switch member 98 to supplypower to the motor 38 there-l by causingoperation of the pump.

Contractile springs 114 may be disposed between the casing 12 and theinner endsof the hooks 68, normally urging the inner ends of the hooksdownwardly'to thereby operate the switch 96, the sprlngs being of such`Weight however that when the nozzles 58` are hung on their respectivehooks 68, the action of the springs will be overcome, causing closure ofthe switch 96. The use of springs 114 is of course optional asit may bedesired to eliminate such springs to permit operation by directactuation by the operator only, thatvis, i

the Ipump operator mustraise the outer ends of the hooks'68 to depressthe rod 106.

Referring now to the pump and by-pass valve particularly illustrated inFigure 5, it will be seen that the pump is of the rotary type driventhrough suitable gearing, al-

A- ready described, at the speed producingthe capacity required. Forinstance, for comparative figures it might be said that the speed isapproximately 490 R. P. M. in the .double meter system as contrasted -tothe speed of 420 R. P. M. in the single meter system. \The pump 28includes a suitable casing 116 which supports the operating shaft 30.provided with a suitable rotor 118, the ro` tor being operable to drawgasoline or other liquid through the suction line 22 where it passesthrough the chamber 120, being forced through the housing by means ofthe rotor- 118 to the chamber 122 and thence upward v through thesuction line 22 to themeters, a plug 123 beingv shown in said chamber122 in the place normally occupied by an air dome or expansion chamber,as shown at 29 in Figure 1. Thecasing 116 is provided with. a valvechamber 124 containing the valve 126v vshown closed on the seat 128,preventing flow of liqu'd through the passage 130 past the seat 12through the-passage 132 to the pump chamber 120. The valve disc 126 isprov ed with a stem 134 which in turn is provid- 'ed with asupplementary disc 136 sliding example, in the usualtype of by-passvalve,

if the pressure rises a very small fraction of a point beyond thatrequired to open the valve, the. valve opens and closes immediately assoon as the pressure has fallen suiliciently for the spring to be ablevtof close the valve. Thus it may be seen that the entire 'range ofpressure necessary to open and close.

the by-pass or relief valve may be only a. small fraction of a pound.This means that iso"- slight and unavoidable variations in the pressurein the seat will cause the by-pass valve to open and close very rapidly,Yproducing a noisy or fluttering by-passwalve and a considerablelvariation qin the pressure throughout the system. With my improvedby-pass valve, this, variation is much reduced and a considerablymoreconstant pressure is maintained in the system at all times, evenwith both nozzles open. For example, if the spring 140 is set` at .15lbs. pressure and the area of the valve 126 is one square inch, then thevalve 126 will open when the'pressure becomes 15 lbs. per square inch.However, when the valve opens, the loosely litting disc 136 offersconsiderable restriction to the flow of the liquid from vthe chamber 122to the chamber 120. This has the effect of increasing the applied forceon the valve 126 acting against the spring 140. Let-,us say then thatthe area of the disc 136 is made two square inches. Then neglectingleakage past the disc 136, there is now a 30 pound pressure on thespring 140 which of course permits the disc 136 to jump open since thespring is pro# portioned so that the additional pressure in the springis suiiicient to overcome the increased spring pressure caused by itshigher compression. The valve. then will remain open until the pressurefalls below 7% lbs. per square inch, which corresponds to 15 lbs.pressure in the system. Thus it will be seen that the spring is notlikely to oscillate rapidly in the seat.

In actual practice, the pressure dii'erentials will work out quitedifferently from that above described, it being understood that theabove example is only given for the sake of clarity. For example, inactual practice consideration must be given to the loose fit of the disc136 and the additional pressure in the spring caused by furthercompression as the additional pressure against the spring may almost becounterbalanced by the increased spring tension.

When two meters are operated in the system through discharge from bothnozzles simultaneouslv, a different problem is encountered, as the flowis divided. If both nozzles are open at the same time serving two cars,it will be seen that this lessens the effective head against which thepump operates, so that there is a tremendous drop in pressure in thesystem. VA typical example would be with the by-pass 'valve set forabout 15 lbs.; then with one nozzle open the typical pump would bedischarging to its full capacity, about 175 G. P. M. and the pressure inthe system would drop to about 8 lbs. If the other nozzle is opened atthe same time, the pressure drops to as low as 2 lbs. or 3 lbs., andeach nozzle delivers approximately 71/2 G. P. M. Withboth nozzlesclosed, the pressure for which the by-pass valve is set (15 lbs. in thisinstance) is maintained` in the of pressure being maintained. It willtherefore b'e seen that under the usual conditions, the meters will notmeasure the same when one nozzle is open as when both nozzles are open,because as stated above most meters will give entirely differentmeasurements with a pressure of 8 lbs. than when used with a pressure of3 lbs. If both meters are calibrated to deliverv exactly five gallonswhen used singly, the error when used together with the reduced pressuremay amount to twenty cubic inches or even many times more in livegallons. The permissible manufacturers" toler-l ance on this amount isonly 31/2 cubic inches.

ith extremely Through the new system, the subject-maty ter of thisapplication, it ispossible to obtain,

the same accuracy irrespective of whether one A or both nozzles areopen. This is done by employing a larger capacity pump with the bypassvalve set for a pressure which will give a rate of flow which may bemaintained whether one or both nozzles are open. In

the improved system, the pump is by-passing about half of its capacitywith one nozzle an is only completely closed when both nozzles 15 G. P.M. comprising the remainder 'of the capacity of the pump would beby-passing around the pump and the pressure would remain at 15 lbs. Withboth nozzles open, the pressure still remains at ./approximatel 15 lbs,and 15 G. P. M. is being discharged rom each'of the two nozzles and theby-pass valve is closed.

To sum up, in the usual system the'by-pass valve acts only as a reliefvalve and functions only when both nozzles are closed with the pumprunning. In the improved system, the by-pass valve acts as a pressureregulator in connection with the pump whichhas su'i cient capacity tomaintain the maximum pres sure desired whether one or both noz'zles areopen.

Most gasoline dispensing pumps have some sort of means for showing whenthe system is full of gasoline, when gasoline is flowing from the deviceor when complete delivery has been made, this means usually being in asest.

the form of ua lass cylinder. As hasalready been describe a sig'ht glass54 fulfilling these functions is isposed between each meter 16 and thedispensing hose 56, communication from the meter being througlh theconduit 53. It is essential that the slig glass, such as illustrated'particularly in igure 6, be kept full of gasoline and that all the airand/or vapor be kept out; the air en- 10 tering the system through leaksin any artn p of they line, through a leaky suction lne. Gasoline maybreak up into vapor and give the same-appearance as air. Since the sightglass glass must be at substantially the highmt of the system in orderto show 1mme 'ately if any of the gasoline Vin the system drains backdue to a leaky valve, such as the check valve 26, .the .airor vaporusually collects at that point and displaces corre- 120 sponding amountsof gasoline, thus render-- ing the amounts discharged or registeredinaccurate.. j In a' meter system, the sight glass and the gasoline initiscontinually under pressureand is never empty, as in the case of 125visible pumps, which is obvious as there is to be immediate deliveryfrom the pumps of the` meter type and also because gasoline oncepast-the meter is measured by said meter. When the air has oncecollected in the sight F glass, it may sometimes be removed by pump' lngmore gasoline through said sight glass,

althoughr with the larger types1 of these `pum ,the base 144 is providedwith an inlet portlon 146 having a threaded portion 148 adapted .to besecured to the conduit 52 by means of a collar 150. The base is providedwith an upstandingshouldered portion 152 50 adapted to yform a seat forthe cylindrical glass container 154, a cap 156 secured to the base bymeans of threaded bolts 158 completing the sight glass assembly, it`bein understoodthat suitable gaskets 159 are isposed between the baseand the top and the glass cylinder 154.

The conduit -146 extends upwardly as at 1 60 to a point within the glass154 and preferably enters the glapss ata -point oii'wof the 00 verticalaxis in order to provide greater tur-l bulence, Celluloid balls orfloats 162' bein provided for indicating the liquid ilow within theglass. Conducting portion 164 is provided for draining the gasolinefrom'the :.65 -sight glass fromaround theupstanding pori tion 160, saidportion 164 terminating in a threaded portion 166 formin means forconnecting the hose 56 to said slght glass. The

top 1,56 is provided with a raised portion 168 to which -is threaded asat 170 a portion of tubing 172, which tubing extends verticallydownwardly through the sight glass arrange# ment and through a suitablecollar 174 provided in the upstanding portion 160 of the inlet conduit146, the tubing 172 thence extending downwardly into the'dischargepassage or conduit 164. At the highest possible polnt in the tubing 172,a number of apertures 176 are provided permitting ingress to said tube.

The li uid then enters the sight glass through t e inlet passage 146 andthe up.- standing portion 160, agitatinlg the balls 162 indicating theliquid How in t e system, and thence passesdownwardlythrough the passage164 into thehose 56 and is. discharged through the nozzle 58. Ifany aircollects in f the sight glass or should any vapor be formed, the liquidpassing the lower opening 178 of the tube 172 forms a partial vacuum katthis point, which is communicated through the tube 172 to the top of thesight any air or vapor collected will be drawn down into the'discharging liquid and exhausted through the hose.

As air 'or vapor will register on most meters just as will liqiziid, itmay be desirable to provide a device for the elimination of any air orvapor in the suction line between the pump 28 and the meters 16, whichdevice may 'bei serted conveniently, for instance, at thel fitting 180.The device may be of the character-as illustratedin Figure 7, whichconsists essentially of a container 182 provided with any number/ofbaiile plates 184 so disglass by means of the apertures 17 6 so that yposed that the discharge portion ofthe line pipe'22'forces the gasolineagainst said baille plates, releasing the gas or vapor upwardly, theliquid falling to the bottom of said container. A pipeline 186 issecured at the highest point of the container 182 and is connected tothe atmosphere, a suitable vent, or to the -supply tank or reservoir sothat any vapor or air may either be vented or returned to the supplytank where it will be vented. A float 188 is provided guided .in .itsvertical movement by any suitable means and provided with a valve 190adapted to close lcommunication between the container and the conduit186 after a suitable amount of gasoline is introduced to the container182,

v114s y after which continuation of operation of the pump will force thegasoline on through the continuation 23 of the suction line 22to 'themeters. y

In pumps of the meter type around the pump, some of the energy isdissipated in the form of heat s'o as to 'raise the with the by passvalve open andthe liquid circulating f liquid into gas, and for thisreason, it may be found desirable to modify the pump and by-passstructure, such as illustrated in Figure 5, to include a cooling coil inthe system. This may be done very easily by forming the pump casing witha mainrotor-cont'aining portion 192, through which the shaft30 extends,said casing being provided with a portion 194 cooperating with thesuction line 22 directly from the main reservoir and through v whichliquid is supplied to the pump, .the portion 194 also having an upperpart 196 for the reception of the by-pass valve which has already beendescribed withrespect to Figure 5. The pump casing is provlded withanother chamber 198 which may have connected thereto the expansionchamber 200, said chamber 198 being in communication with a portion ofthe suction line. extending .11pwardly to the meters, there being noconnection between the valve containing portion 196 and the chamber 198:instead, said chambers are connected through piping or conduit 202 whichmay conveniently extend upwardly within the standard 12 to a high ypointin the system or above the meters 16, a portion of said conduit beingprovided with cooling fins 204 and also the expansion Jchamber 206 sothat when the pump is by-passing liquid,-

instead of flowing directly from chamber 122 through the by-pass valveto the chamber 120 and thence around the pump (Figure 5), it Hows fromthe chamber 198 upwardly through the conduit 202, downwardly throughsaid conduit, through the valve chamber 196 to the chamber 194 andthence to the pump, and in this manner is cooled.

In the operation of the meter pump, let it be assumed that both nozzles58 are hung on the hooks 68 and that the pump is therefore inoperative.Then if it be desired to dispense gasoline from say one of said nozzles,the nozzle is removed from the hook 68 and the outer portion of saidhook is raised either manually or through the spring 114` therebydepressing the inner end, causing the crosshead 108 to be depressed.When said crosshead is depressed, the switch operating rod 106 isdepressed to thereby operate the switch arm 98 of the switch 96 to closesaid switch to supply electricity to the motor 38, causing actuation ofthe-pump 28 through the sprocket gearing 36, 34. 32. Depressing theinner end of the gear 68 also depresses link 72 which causes thecorresponding valve 52 to be rendered operative by actuation of the cam80 through the lever 76 and shaft 78, the cam causing depression of thevalve 82 against the spring 88.

Actuation of the motor and pump causesI the gasoline or other liquid tobe drawn lation in pressure.

through the suction line 22, upwardly l through the strainer 24, throughthe check valve 26, through the pump casing to the upper portion of thesuction line 22 and thence through the opened valve 52 to thecorresponding meter 16, causing said meter to register, and thenceoutwardly through the -passage 53 to the passage 146 and upwardlythroughthe passage 160 into the sight glass 154, agitating the balls`162,.the liquid then flowing downwardly through the passage 164 intothe hose 56 and outwardly through 'the nozzle 58, it being understoodthat the handhold 62 has been operated to open the valve to permitdischarge of liquid from the flexible nozzle portion 66. It is of courseappreciated that should anyair be trapped in the sight glass, it isdrawn through the apertures 176 into the power tube 172 by the vacuumformed at the end portion 178 thereof. Y

If the fitting 180 is replaced by the vapor elimitnatorffas illustratedin vFigure 7, the operation is substantially the same with the exceptionthat liquidis first forced against the baffles 184, the gas beingexpelled through pipe 186,' the gasoline filling the chamber 182 untilthe iloat188 is raised a suficient amount to seat the valve 190, afterwhich the gasoline is pumped through the extension 28 of the pipe 22upwardly to the corresponding meter 16.

Any shocks incident to operation Vare absorbed in the system by means ofthe air dome 29 so that none ofthe joints or any of the working partswill be injured.

If it is desired to use the other hose, which up to this time has beendescribed as in inoperative position, said hose is removed from its hook68 and the inner end 'of the hook is depressed either manually orthrough its spring 114. Depression` of the inner end of the hookwill/operate to open its valve 52 to thereby permit passage pastthevalve, through the meter and through the sight gauge and so to itsnozzle 58. As has already been explained, when one hose is in operationand the other hose is brought into operation subsequently, there is atremendous drop in pressure in the line, and ordinarily this would meanan inaccurate measure on the meters 16; that is, the meters would notmeasure the same when one noz'zle is open as when both nozzles are opendue to this vari- It is therefore very important that some means beprovided whereby`a lcorrect measure is effected, and this is done inthis case by employing a larger capacity pump with the by-pass valve set for a pressure which will give a -rate of iiow which may bemaintained whether one or both nozzles are open. To do this, as hasalready been explained, when only one nozzle is being used, the bypassvalve is open and the pump-- is bypassing one-half of its capacity sothat when the suction nozzle 58 is removed and put into operation, theonly 'substantial effect on the system is that the by-pass valve isclosed and the portion of liquid normally by-passing is discharged fromsaid'nozzle. It will be seen then that the by-pass valve where used in adouble meter system is not a relief valve strictly speaking but is apressure regulator so that the maximum ressure is maintained in thesystem regard ess of how many nozzles are discharging. If then duringoperation one nozzle is rendering inoperative b'y closing the valve 60while the other nozzle is discharging, andthe inoperative nozzle is hungon the hook68 toiraise the inner endl thereof, the only effect that thiswillhave on the system-will be to cause the valve 126 to open toby-passone-half of the liquid pumped and to close the valve 52 on. the closednozzle side, which valve closes by 0peration .of the cam through theshaft 78 and the lever 76 through the link 7 2,` as the loose connectionbetween. the crosshead and the inner end of the hook 68 causes no eiecton the .switch operating rod 106, and it is y only when the other nozzleis rendered inoperative and hung on) its hook 68 that the frod 106 ispermitted' to move upwardly to .open theswitch 96 to render the `motor38inoperative. It is to be understood that I do not wish to be'limitedby the ex'act embodiment of the deviceshown, which is merely by way ofillustration and not limitation, as various and other forms of thedevice will of course be apparent to those skilled in the art withoutdeparting from the spirit of the invention orr the scope of the claims.l

I claim:

liquid dispensing apparatus, the combination ofan indicating deviceincluding.

a visible chamber, an upwardly directed inlet entering the bottom ofsaid chamberl at an angle tothe axis thereof to produce greaterturbulence therein, an outlet communicating to a draw off connectiondisposed inthe bottom thereof, buoyant indicating means in said chamberto indicate the amount or iiow of liquid-therein, and a tubularmemberhaving an openingmear the top thereof and extending into -said outlet,theopenlng in said A member'being adjacent the top of said chambervwhereb)1 air, vapor and the like are drawn olf from said chamber tosaid outlet by flow of liquid through said. device.

2. In liquid dispenslng apparatus, the combination of an indicatingdevice including .a

visible chamber, an upwardly directedl inlet entering the bottoni ofsaid chamber, an outlet communicating to a draw oi connection disposedin the bottom thereof, 'buoyantgm' dica'ting means insaid chamber toindicate the4 amountor 'low of liquid'therein, and a tubularjnemberhaving an opening mear' the top thereof and extending into said outlet,

.the opening in said member -being adjacent the top'of said chamberwherebyair, vapor and the like are drawn off from said chamber to saidoutlet by iow of liquid through said device.

3. In .liquid dispensing axparatus,the combination of an indicating anoutlet to said chamber, and means havil an opening therein adjacent thetop of sai -chamber indicatingl the amount or. flow of liquid therein,an -inlet to said chamber and an outlet to said chamber, and means havinan opening therein adjacent the top of sai chamber and extending intosaid outlet nwhereby air, vapor and the like lare drawn off from saidchamber to said outlet.

5. In liquid dispensingapparatus, the combination of a supply line forconnection to a evice including a visible chamber, an inlet to saidchamber and chamber and extending into sald loutlet f source of liquidsupply, a pump disposed in v said line for pumping liquid therethrough,a measuring device in said line and connect- 'ed to discharge means fordetermining the amount of discharge of said apparatus, a

visible How indicator in said discharge means,

and means for eliminating air, vapor and the like from said visible Howindicator.

6. An indicator forv wethose liquid dispensingapparatus comprising acasin havingI a visiblechamber through which t liquid passes, an inletconduit adjacent the lower .portion of the chamber terminating in' anorifice acting to direct the liquid upward into contact with the top ofthe chamber from where it flows downwardly, an outlet conduit atthebottom of the chamber which receives the'down How of liquid and meansforming a passage from the top of the chamber down-.- wardly terminatingadjacent the lower. portion of the chamber in the down current of liquidacting 'to create suction to extract air or gas from the chamber.

7. An indicator for wet hose liquid dis du pensing apparatus comprisingan open-ende transparent casing having a closure at both the liquidpasses, an= inlet conduit terminating in an upwardly directed orificedisposed substantially centrally ofthe lower end of ends to form avisible-chamber through which the chamber acting to .direct the liquidinto contact with the upper closure from where it flopvsdownwardly, anoutlet 'conduit at within/the chamber from the upper end thereof I"d')wnv`v ardly .terminating adjacent the low end of the chamber in the.down current 'of liquidI acting to create suction which ejects air orgas from the chamber.

' the bottom of the chamber to receivel the down `flow ot'liquid andmeans forming a paage 125'- 8. 'An indicator for wet hose liquiddispensing apparatus comprising a hollow transparent casing, open at topand bottom, a closure for each end, means connecting both closuresacting to clamp the casing therebetween thus forming a transparentchamber, an inlet conduit in the lower closure terminating in anupwardly directed orifice disposed substantially centrally of the lowerportion of the chamber acting to direct the liquid against the upperclosure from where it Hows downwardly, an outlet conduit in the lowerclosure to receive the down flow of liquid v and a conduit extendingdownwardly from the top of the chamber terminating adjacent the lowerend thereof in the down flow of liquid acting to create suction whichacts to extract air or gas from the chamber.

9. An indicator for wet hose liquid dispensing apparatus comprising ahollow transparent cylinder having its'axis vertical, a closure at thetop and bottom thereof, means connecting the closures acting to clampthe cylinder therebetween, an inlet conduit. in the lower closureentering horizontally'and terminatin .in an upwardly directed orificedisposed su stantially centrally of the lower end of the chamber actingto direct the liquid against the upper closure from where it flowsdownwardly, an outlet conduit in the lower closure to receive the downflow of liquid and an ejector extending from the upper end4 of thechamber downwardly terminating adjacent the lower end of the chamber'inthe down flow of liquid acting to extract air or gas from the chamber. Y

10. An indicator for wet hose liquid dis? pensing apparatus comprisingan open ended transparent casing, a closure at the top and bottomthereof to form a visible chamber through which the liquid flows, aninlet conduit in the lower closure terminating in an upwardly directedorifice acting to direct the liquid against the upper closure from whereit flows downwardly, an outlet conduit in the bottom closure to "receivethe down low of liquid, a recess in the upper closure above andadjoining the chamber, an e'ector tube extending from'a point within t erecess downwardly terminating adjacent the lower end of the casing inthe own flow of liquid acting to extract air or gas from the chamber.'

11. An indicator for wet hose liquid dispensing apparatus comprising acasing having a visible chamber through whichv the liquid passes, aninlet conduit terminating in an orifice acting to direct .the liquidupward into contact with the top of the chamber from where it flowsdownwardly, an outlet conduit which receives the down lflow 02E liquidand means forming a passage from the top of the chamberdownwardlyterminating 12. The combination with an enclosure having aninlet and an outlet, the upper portion of the enclosure beingin positionto collect entrapped air from li uid flowing through said inlet intosaid enc osure, and -an ejector tube extending from said upper portionof said enclosure toward'said outlet, said tube having an outlet openingin the liquid current flow to effect suction at theinlet end of saidtube located in the said upper portion of saidenclosure. Y

13. The combination of an enclosurehaving an inlet and an outlet and aninner upper portion in which entrapped air in incoming liquid mayaccumulate, and an ejector'tube having an inlet opening in said innerupper portion and an outlet tube in the path of the outlowing liquid toproduce suction in said tube to eliminate the tendency for suchaecumulating air to form an air pocket.

14, The combination with dispensing apparatus havin a' discharge pipeand a dispensing hose, o? a sight gauge located between said ipe andsaid hose, and an ejector tube in sai gauge withv an inlet opening inthe upper portion of the gau e and an outlet opening in the path ofliquid lowing into said hose.

15. In a sight gauge for liquid dispensing l parent wall, and meansassociated with said outlet for ejecting through said outlet accumulatedgases in the upper portion of said enclosure.

16. The combination with a standpipe for dispensing apparatus, of a. siht e gauge at the top of said pipe and having an outlet opening adaptedto be connected to a dispensing hose, and anv ejector tube having aninlet opening located in the upper portion of said sight gauge and anoutlet o ening in the path of flow of. liquid througlh th`e outletopen-ing for the said dispensing hose.

17. The combination with a. sight gauge adapted to be positioned at thetop of a priming column of dispensing apparatus and having a liquiddischarge, said sight gauge having a closed top, and means associatedwith said discharge for ejectiiig accumulating air in said gauge while`said top remains closed.

18. The combination with a sight gauge having a li uid discharge, ofmeans for keeping said sig t gauge entirely lled with liquid while theliquid is iowing therethrough, means automatically operated by the flowof liquid from said liquid discharge for with- 19. The combination withdispensing.,

apparatus Lcomprising a liquid discharge pipe, of asight gauge at theupper end thereof, a dispensing hose connected to an outlet in saidsight auge, and means associated l with said disc arge pipe for ejectingair from the upper portion of said gauge into vsaid hose, to maintainthe sight gauge filled with liquid. 'y A 20. The combination vwithdispensing apparatuscomprising a discharge pipe, of a sight gauge at theupper end thereof, a ldispensinghose' connected to the outlet opening insaid gauge, and an ejector tube extending from the upper portion of saidgauge into said hose. i

21. The combination of a sight gauge having a top, and means rigidlyconnected toisaid top and depending therefrom, said means beingassociated with said liquid discharge for withdrawing air from saidgauge.

22. The combination with a sight gauge, of

Y a non-movable means mounted in-sald gau e for withdrawing airtherefrom, and movab e means operable by {iowingliquid to indicate suchflowv while the gauge is maintained full of liquidr by elimination ofair by said air ejector.

23. The combination with a sight gauge, of a discharge pipe connected tothe bottom of said sight gauge, and an'ejector tube extending from theupper portion of said sight gauge into said discharge pipe.

- 24. The combination with a sight gauge, of a discharge pipe formin anon-restricted passageway, means a'or ing an outlet passageway from saidsight gau e to said discharge pipe, and an' air con uit extending fromthe upper portion ofsaid sight gauge into said discharge pi e.

25.I The combination 'with a sight gauge having a liquid discharge, andmeans entire y enclosed by the sight gauge. and having a portionassociated with said liquid discharge for ejecting gases from the gaugeupon the flow of liquid from said discharge.

26. The combination withan elevated enclosure having an inlet and anoutlet in its .lower ortion, an immovable tube extending from t e upperportion of the enclosure into said outlet, said tube communicating atits upper end with the upper portion of the enclosure and communicatingat its lower end with said outlet. l

27. In a device. of the class described, a hollow, vertical, transparentbody having open said outlet opening whereby outowing liquid surroundsthe lower end of the pipe, said pipe being located in a deeper portionof the rece and aving an opening in its side for the purposes described.

In testimonywhereof I have hereunto set m hand.

y' LYON MecANDLEss.-

upper and lowerends, upper and lower heads closing the ends thereof,said vlower head having liquid inlet and` outlet openings spaced fromeach other, whereby air or gas carried by said liquid collects beneathsaid up head, and suction means for automaticaiiiy withdrawing said airor gas thus collected i upon the passage of liquid into said device atlthe inlet opening and out at said outlet openlng. l 28. A device of theclass described comprising, a vertical, transparent,.hollow body memberopen at both ends, an upper head clos-

